XML 41 R30.htm IDEA: XBRL DOCUMENT
v3.20.2

Investment Securities Maturity of Held-to-Maturity Securities (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2020
Schedule of Held-to-maturity Securities [Line Items] |
Debt Securities, Held-to-maturity [Table Text Block] | Below is an analysis of the amortized cost and fair values of debt securities held to maturity at:
| September 30, 2020 |  | December 31, 2019
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
| (dollars in thousands)
Obligations of U.S. Government Agencies: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-Backed Securities – Residential | $ | 2,937 |  |  | $ | 151 |  |  | $ | — |  |  | $ | 3,088 |  |  | $ | 3,392 |  |  | $ | 57 |  |  | $ | — |  |  | $ | 3,449 |
Mortgage-Backed Securities- Commercial | 41,334 |  |  | 1,537 |  |  | — |  |  | 42,871 |  |  | 51,291 |  |  | 18 |  |  | (184) |  |  | 51,125 |
Obligations of U.S. Government-Sponsored Enterprises: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-Backed Securities – Residential | 171,100 |  |  | 5,646 |  |  | (19) |  |  | 176,727 |  |  | 229,667 |  |  | 1,377 |  |  | (294) |  |  | 230,750 |
Mortgage-Backed Securities – Commercial | 10,334 |  |  | 375 |  |  | — |  |  | 10,709 |  |  | 12,081 |  |  | 67 |  |  | — |  |  | 12,148 |
Obligations of States and Political Subdivisions | 42,133 |  |  | 661 |  |  | (1) |  |  | 42,793 |  |  | 40,092 |  |  | 554 |  |  | — |  |  | 40,646 |
Debt Securities Issued by Foreign Governments | 800 |  |  | — |  |  | — |  |  | 800 |  |  | 600 |  |  | — |  |  | — |  |  | 600 |
Total Securities Held to Maturity | $ | 268,638 |  |  | $ | 8,370 |  |  | $ | (20) |  |  | $ | 276,988 |  |  | $ | 337,123 |  |  | $ | 2,073 |  |  | $ | (478) |  |  | $ | 338,718 |
Schedule of Held-to-Maturity Securities by Maturity [Table Text Block] | The amortized cost and estimated fair value of debt securities held to maturity at September 30, 2020, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or repay obligations with or without call or prepayment penalties.
| Amortized Cost |  | Estimated Fair Value
| (dollars in thousands)
Due within 1 year | $ | 4,949 |  |  | $ | 4,974 |
Due after 1 but within 5 years | 11,195 |  |  | 11,310 |
Due after 5 but within 10 years | 19,760 |  |  | 20,232 |
Due after 10 years | 7,029 |  |  | 7,077 |
| 42,933 |  |  | 43,593 |
Mortgage-Backed Securities (a) | 225,705 |  |  | 233,395 |
Total Debt Securities | $ | 268,638 |  |  | $ | 276,988 |
(a)Mortgage-backed and collateralized mortgage securities, which have prepayment provisions, are not assigned to maturity categories due to fluctuations in their prepayment speeds. Mortgage-Backed Securities include an amortized cost of $44.3 million and a fair value of $46.0 million for Obligations of U.S. Government agencies issued by Ginnie Mae and an amortized cost of $181.4 million and a fair value of $187.4 million for Obligations of U.S. Government-sponsored enterprises issued by Fannie Mae and Freddie Mac.

X
- Definition [Table Text Block] for Schedule of Held-to-Maturity Securities by Maturity [Table] + References No definition available. + Details
Name: | fcf_ScheduleofHeldtoMaturitySecuritiesbyMaturityTableTextBlock
Namespace Prefix: | fcf_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information about investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5B -URI http://asc.fasb.org/extlink&oid=121645371&loc=SL120269825-111563 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5A -URI http://asc.fasb.org/extlink&oid=121645371&loc=SL120269820-111563 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27232-111563 + Details
Name: | us-gaap_HeldToMaturitySecuritiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration